Lead-Carbon Electrode Compression Moulding for Stable Charge Cycling
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Solution Overview
Problem
Existing batteries used in renewable energy storage and automotive applications face instability due to voltage fluctuations, leading to reduced lifespan and increased replacement costs, as they struggle with unsaturated charging and discharging cycles.
Innovation Solution
A method for lead carbon compression moulding involving stacking and compressing lead and carbon materials to form a lead-carbon electrode, with controlled thickness ratios and compression ratios, eliminating the need for heat treatment and pressurized environments, and using carbon fiber fabrics without additional chemical treatments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional batteries are used in renewable energy storage systems, then energy storage capacity is achieved, but voltage instability causes battery degradation and short service life
Solution Approach 1:
The patent uses a composite structure combining lead material and carbon material in a sandwich configuration. The carbon material layer (graphite or carbon fiber) is integrated with the lead material to form a lead-carbon composite electrode. This composite structure leverages the high conductivity and stability of carbon to mitigate voltage fluctuations, while maintaining the electrochemical activity of lead, thereby improving battery reliability under unstable voltage conditions.
Solution Approach 2:
The invention introduces carbon material specifically at the interface between lead materials in the sandwich structure. This localized carbon layer serves as a buffer zone that directly addresses the voltage instability issue at the critical junction points, providing enhanced stability where it is most needed while preserving the overall electrode performance.
2Ease of manufacture
If compression moulding with high compression ratio is used, then lead-carbon electrode formation is achieved, but excessive compression may damage the electrode structure
Solution Approach 1:
The patent specifies a controlled compression ratio range of 5:1 to 15:1 (d1/d2), avoiding excessive compression. This parameter optimization ensures sufficient bonding between lead and carbon materials while preventing structural damage. The method also controls the compression force to be within 0.1-10 MPa, balancing consolidation needs with structural preservation.
Solution Approach 2:
The lead material and carbon material are pre-assembled into a sandwich structure before compression. This preliminary arrangement ensures proper alignment and spacing, allowing the compression step to focus solely on bonding without causing misalignment or structural damage that would occur with post-assembly compression.
3Productivity
If traditional battery manufacturing methods are used, then production capacity is achieved, but heat treatment and pressurized environments increase energy consumption and environmental impact
Solution Approach 1:
The patent replaces thermal processing (heat treatment) and high-pressure processing with a controlled compression moulding method. Instead of using high temperatures to bond materials, the invention uses mechanical compression at controlled pressures (0.1-10 MPa) and temperatures (20-200°C), significantly reducing energy consumption and eliminating the need for complex pressurized equipment.
Solution Approach 2:
The compression moulding process allows the lead-carbon sandwich structure to self-bond under controlled compression without requiring additional chemical treatments or extreme conditions. The materials' inherent properties enable bonding through the specified compression parameters, simplifying the manufacturing process and reducing auxiliary energy requirements.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method produces a lead-carbon electrode with stable Coulomb efficiency, high conductivity, and resistance to fast charge/discharge cycles, reducing battery breakage and extending lifespan while being environmentally friendly.
Implementation Method 1
compressing the first lead-carbon sandwich between a first compressing unit and a second compressing unit such that the first lead material and the second lead material are combined with the first carbon material
Data Source
AI summary
The present invention discloses a method for lead carbon compression moulding comprising a first stacking step and a first compressing step so that a lead-carbon electrode is obtained through compressing a lead-carbon sandwich stacked of a lead material and a carbon material. Pressurization of the working environment or heating both the lead material and the carbon material is not required during the procedure. A massive production of lead-carbon electrode at room temperature can be anticipated. The lead-carbon electrode produced thereby enhance tolerance of the battery against instable electric current or voltage, and performance remains steady after multiple times of charge-discharge cycles. The lead-carbon electrode produced thereby demonstrates high potentials for application with low cost, low loss and high capacity.